Browsing Τμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών / Department of Electrical and Computer Engineering by Author "Eleftheriades, G. V."
Now showing items 21-37 of 37
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Article
A folded-monopole model for electrically small NRI-TL metamaterial antennas
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)An improved model for analyzing electrically small NRI-TL antennas is proposed, that highlights the methods that enable these antennas to offer a good impedance match and a high radiation efficiency compared to previously ...
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Article
An investigation of printed Franklin antennas at X-band using artificial (metamaterial) phase-shifting lines
Wang, P. P.; Antoniades, Marcos A.; Eleftheriades, G. V. (2008)Non-radiating artificial phase-shifting lines are constructed using conventional positive-refractive-index (PRI) transmission lines (TL) and the recently developed negative-refractive-index (NRI) transmission lines. The ...
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Conference Object
A miniaturized multiband monopole antenna using a double-tuned wheeler matching network
Antoniades, Marcos A.; Eleftheriades, G. V. (2010)In the reception and transmission of radio signals it is often required to match an antenna to its feed line over a wide frequency band. In order to achieve this, many techniques have been proposed which address the ...
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Conference Object
A multi-band NRI-TL metamaterial-loaded bow-tie antenna
Antoniades, Marcos A.; Eleftheriades, G. V. (2011)A compact, fully-printed and low-profile bow-tie antenna is proposed, which exhibits multi-band performance by loading a reference bow-tie antenna with series capacitive gaps and shunt inductive strips, to form an asymmetric ...
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Article
Multiband compact printed dipole antennas using NRI-TL metamaterial loading
Antoniades, Marcos A.; Eleftheriades, G. V. (2012)A compact, fully-printed negative-refractive-index transmission-line (NRI-TL) metamaterial-loaded dipole antenna is proposed, which exhibits multiband resonant characteristics that are not harmonically related. The multiband ...
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Conference Object
A multiband monopole antenna using a double-tuned Wheeler matching network
Antoniades, Marcos A.; Eleftheriades, G. V. (2010)A double-tuned matching network is proposed, which replaces one of the resonant circuits in aWheeler matching network with a λg/2 transmission line in order to achieve broadband and multiband matching performance. The ...
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Article
A multiband monopole antenna with an embedded reactance-cancelling transmission-line matching network
Antoniades, Marcos A.; Eleftheriades, G. V. (2010)A series reactance-canceling (SERCA) transmission-line (TL) matching network is proposed, which replaces the series resonant circuit of a double-tuned Wheeler matching network with a λg/2 TL in order to achieve a broadband ...
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Conference Object
A Negative-Refractive-Index Transmission-Line (NRI-TL) leaky-wave antenna with reduced beam squinting
Antoniades, Marcos A.; Eleftheriades, G. V. (2007)
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Conference Object
Negative-refractive-index transmission-line metamaterial-loaded dipole antennas
Antoniades, Marcos A.; Eleftheriades, G. V. (2012)Several compact, fully-printed negative-refractive-index transmission-line (NRI-TL) metamaterial-loaded dipole antennas are proposed. The antennas achieve multi-band behaviour by loading a host dipole antenna with series ...
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Conference Object
Negative-refractive-index transmission-line metamaterials and enabling electromagnetic applications
Eleftheriades, G. V.; Grbic, A.; Antoniades, Marcos A. (2004)The negative-refractive-index (NRI) metamaterials, for which the permittivity and permeability are simultaneously negative, were discussed. The results for two RF/Microwave devices and structures, based on transmission-line ...
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Conference Object
A NRI-TL metamaterial-loaded bow-tie antenna
Antoniades, Marcos A.; Eleftheriades, G. V. (2011)A fully-printed and low-profile bow-tie antenna is proposed, which exhibits multi-band performance by loading a bow-tie antenna with series capacitive gaps and shunt inductive strips, to form an asymmetric two unit-cell ...
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Conference Object
A quad-band rat-race coupler based on the Generalized Negative Refractive-Index Transmission-Line concept
Papanastasiou, A. C.; Georghiou, George E.; Eleftheriades, G. V. (2013)
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Article
A quad-band wilkinson power divider using generalized NRI transmission lines
Papanastasiou, A. C.; Georghiou, George E.; Eleftheriades, G. V. (2008)
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Conference Object
Selected antenna applications of Negative-Refractive-Index Transmission-Line (NRI-TL) metamaterials
Eleftheriades, G. V.; Antoniades, Marcos A.; Qureshi, F. (2006)Metamaterials (MM) that exhibit a simultaneously negative electric permittivity E and magnetic permeability μ, and thus a negative refractive index (NRI), have recently attracted considerable attention in the electromagnetics ...
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Conference Object
Some antenna applications of negative-refractive-index transmission-line (NRI-TL) metamaterials
Eleftheriades, G. V.; Antoniades, Marcos A.; Qureshi, F. (2006)
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Book Chapter
Transmission-line based metamaterials in antenna engineering
Antoniades, Marcos A.; Mirzaei, H.; Eleftheriades, G. V. (Springer Singapore, 2016)In this chapter, transmission-line-based metamaterials are presented, and their application to the design of passive and active antennas is outlined. Transmission-line metamaterials, also termed negative-refractive-index ...
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Conference Object
A tri-band compact metamaterial-loaded monopole antenna for WiFi and WiMAX applications
Zhu, J.; Antoniades, Marcos A.; Eleftheriades, G. V. (2009)